Defining RMON Alarms 293
■ Delta — Subtracts the last sampled value from the current value.
The difference in the values is compared to the threshold.
■ Absolute — Compares the values directly with the thresholds at
the end of the sampling interval.
■ Rising Threshold — Displays the rising counter value that triggers
the rising threshold alarm. The rising threshold is presented on top of
the graph bars. Each monitored variable is designated a color.
■ Rising Event — Displays the mechanism in which the alarms are
reported. The possible field values are:
■ LOG — Indicates there is not a saving mechanism for either the
device or in the management system. If the device is not reset, the
entry remains in the Log Table.
■ TRAP — Indicates that an SNMP trap is generated, and sent via the
Trap mechanism. The Trap can also be saved using the Trap
mechanism.
■ Both— Indicates that both the Log and Trap mechanism are used
to report alarms.
■ Falling Threshold — Displays the falling counter value that triggers
the falling threshold alarm. The falling threshold is graphically
presented on top of the graph bars. Each monitored variable is
designated a color.
■ Falling Event — Displays the mechanism in which the alarms are
reported.
■ Startup Alarm — Displays the trigger that activates the alarm
generation.
■ Rising Alarm — Displays the rising counter value that triggers the
rising threshold alarm. The rising threshold is presented on top of
the graph bars. Each monitored variable is designated a color.
■ Falling Alarm — Displays the falling counter value that triggers the
falling threshold alarm. The falling threshold is graphically
presented on top of the graph bars. Each monitored variable is
designated a color.
■ Rising and Falling Alarm — Indicates both Rising and Falling alarms
are selected as the startup alarm.
■ Interval — Defines the alarm interval time in seconds.
■ Owner — Displays the device or user that defined the alarm.
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